<script src="<?php echo base_url('public_source/javascript/jquery-1.9.1.js')?>" type="text/javascript"></script>
<script> 
    $(document).ready(function(){
        $("#select2").change(function(){  
        var maalbum = $("#select2").val();
            var name = {
                madong : maalbum
            };
            
            $.ajax({
                    type: "POST",
                    url: "<?php echo site_url("home/findProduct"); ?>",
                    data: name,
                    async: true,
                    beforeSend: function(){
                            $("#Contend_Ajax").html("");
                    }, 
                    success: function(kq){
                            $("#Contend_Ajax").html(kq);
                    }
            });
            return false;
        });
        });
</script>

<select id="select2">              
<?php 
    foreach ($dong as $item)
    {
        echo "<option name='option' value='".$item["fldMaDong"]."'>";
        echo $item["fldTenDong"];
        echo "</option>";
    }
?>
</select>